<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title>阴影</title>
        <style>
           #shadow{
            font-size:26px;
            text-shadow: 10px 10px 5px rgb(20,20,240);
           }
        </style>
    </head>
    <body>
        <div id="shadow">
            阴影在这里
        </div>
    </body>
</html>